I stumbled across this and thought it was pretty worthy. I looked to make sure it is not re-post.
http://aimpoints.hq.af.mil/display.cfm?id=35673
http://aimpoints.hq.af.mil/display.cfm?id=35673
Interesting how the pictures depict the AF crewchiefs hanging out the door while seemingly not really doing anything. On the Navy side, I was pretty sure Aircrew is supposed to be strapped in unless they are doing mission essential tasks in back, as the Gunner's belt is no guarantee of ultimate safety.
Looking out for enemies would be considered a mission essential task. For missions such as CSAR the gunners seats are usually removed.
But, those guys with their feet hanging out are PJs, not the crew chief. Troops don't need seats, they usually use lanyards similar to a climber's quick draw to secure themselves to the helo.
Sweet article...those PJ's are verifiable badasses
The thing with the gunner's belt or the clipped in climbing harness is to ensure your guys don't leave too much slack in the line. The danger is the crewman will be thrown from the aircraft during a crash and the slack in the belt allows enough travel to swing out into the rotor system.